sttjewe



y 1930- w. F. "STUEWE 1,757,552

APPARATUS FOR FORMING MANHOLE -TOPS Filed July 20, 1.928 2 Sheets-Sheet 2 Patented May 6, 1930 WALDEMAR'F. STUEWE, or MILWnUnnnWismNsm 3 .AIPARATUS FOR FGRMIWGIMANHOLE TOPS i Application filed July 20,

This invention relates to amethod and apparatus for forming man-hole topsof concrete, or similar blocks. a

In forming man-hole tops, it is the usual 5 practice to makethem conical and to finish thetop of the "man-hole off with bricks so as to secure the requisite taper. .In addition to this, it is preferable to form the top of the in an-hole With one side vertical and with the other side of varying tapersor slants, so that the man hole can readily carry a ladder on its interior straight side. i i

[This invention is designed to provide a novel method and apparatus for forming T5 man-hole tops and to providea method Whereby individual, distinct blocks are formed and i are numbered in a regular sequence during the forming operation, so that they may he reassembled to produce the truncated conical shape desired. a

Further obj ects of this invention are'to provide a novel form of mold for producing the concrete blocks so that although each-block inaybe distinct and separate from each other,

nevertheless it is numbered in a regular quence so that its exact position niaybereadily ascertained and the "block cemented in place in its regular order so that the exact shape originally intended maybe secured.

Further objects are to provide a very simple method and apparatus for accomplishing the results enumerated above and in which the apparatus may be cheaply produoedand easily operated, and in which the method maybe readily followed. a An embodiment of the invention shown in the accompanying drawings in which i y I Figure 1 is a erticalsec ional view through the finished manhole top, such view corre-j spondingto asection on the line 1-1 of ure 2.

, i u e top with parts'brolren away;

Figure'tw is a vertical sectional View through one of the imolds such yiew corresponding to a section on theline 33 of Figure 4:;

Figure 4 is a plan View of the structure shown in Figure 3.

The man-hole top consists of a series of rings of concrete blocks, such rings being in plan view of the man-hole 1928. Serial no. 294,257.

d icated by the reference charactcrsa, Z) c, and (Z in Figures 1 and 2. These ringsare tori'l'icd of individual blocks; For instance, these rings may be formed of individual blocks, the uppernlo'st'ring forexample, being'formetl ot' thc'bloc'lci numbered are; 28, suchnmnbersbe ing formed in thebloclcsthemselves. Obvious ly other insignia could be used to individually'i'ndicate the block and its correct position relative to the other blocks. Thebloclrs are each of dilierent shape from the succeeding block and consequently each block occupies one and onlyone distinct position in the seinblyl This positioning of the blocks is most easily obtained by following'the regular sequence of numbering thereon. I Each block is preferably formed With-a projecting tongue lwhich fits into a correspondingdepression 2 formed in thead'j acent face ofthesucceeding blockfas shown in Figure 2. The blocks are cemented in place in any suitable manner-"by ordinarymortar, cement; or other binding agent, such mate rial being indicated by the reference Cl1t11- acter 23in 'Figures 1 and 2. i i

It is to benoted that one side of thefinished top is straight andthattheother'side is slant-1 ing. This is desirable as it facilitates the placing of an iron ladder within th'e -n1a nhole, such ladder being omitted for "the sake of clearncss. i i i v The mold for producing the blocks consists of a series of ringstorining successive truncated, yconical sections of decreasing 3 di ameters. "lhese successive molds are pro vided With either the salne or different; nunr bers of blocks. Preferably, there are *four pairs of rings formed to cast the successiye' tiers, a, b, c, and d. The bottom tier could be, in the form showinten blocks, the next tier, nine, the nest tier, eight," and the -upperlnos t tier, seven. f i

The rings or mold "for casting the upper most tierare shown in Figures "3 and 4. The uppermost ring is indicated by the reference character' 't, and the innermost ring "by the reference character 5. 'l he outei' lnostringgis preferably split at diametrically opposite m s d Pro ded w th, ang e? rlip ,6 throng hich time-earnin bolts 7 *i'nay pass.

Tit

The innermost ring may be continuous, as shown in Figure 4.

Between the rings, radial division plates 8 are removably positioned and held in place by means of pins 9 which extend through the rings and into the plates, as shown most clearly in Figure 3. Obviously, other means may be employed for-removably securing or retaining the division plates in place. The rings, when in assembled position, are placed upon bottom plates 10 .(see Figure 4). The bottom plates are provided with a plurality of raised numbers 11 which are formed backwards so that the numbers in their correct position are formed in the blocks themselves. The blocks are cast in aninverted position, as indicated in Figures 3 and 4. After the blocks have been cast and preferably before they are completely hardened, the pins 9 are removed and the'innermost ring slipped upwardly from the blocks. This removal may be readily accomplished as the innermost ring slopes outwardly and upwardly and con sequently freely draws from the blocks. Thereafter, the outermost ring, separated into twoparts, is removed from theblocks. Subsequently, the division plates are removed, preferably after the blocks have become somewhat more hardened. There is one bottom plate provided for each tier or ring of blocks and-the appropriate numbers are carried by the bottom plates.

.It will be seen that a verysimple method of casting concrete-blocks and forming the tops of the man-holes has been provided, and it will be seen further thatthis method can be followed Without requiring any block and tackle or framework of any kind over the top of the excavation for the man-hole.

The blocks are of'relatively small weight so that they may be easily handled by the mason without requiring any framework or block anditackle. c

It will be seen further that the apparatus for forming the blocks is of extremely simple and cheap construction, and that itmay be used with the utmost case. 7

Although the invention has been described in considerable detail, such description is intended as illustrative'rather than limiting as the invention may be variously embodied and as the scope of'such invention is to be determinedas claimed.

Iclaimz- 1. A mold for concrete blocks comprising an inner and an outer r1ng hke membergar ranged in spaced relation, substantially ra dial division plates located between said members in spaced relationto each other, and means for temporarily holding said plates in position, both said ring-like members being conical and said ing split. v r

2. A mold for concrete blocks comprising an inner- ;and an outer ring likejmember arev outer ring;like member; lee-.-

ranged in spaced relation, substantially radial division plates located between said members in spaced relation to each other, and means for temporarily holding said plates in position, both said ring-like members being conical and said outer ring-like member being split, said division plates having a flute therein to produce a depression at one'end of one block and a corresponding projection at the other end of the next adjacent block.

3. A mold for concrete blocks comprising an outer and an inner ring-like member having sides making 'diiierent angles with reference to the vertical, division plates between said ring-like members, and base plates upon which saidring-like members are adapted to rest, said base plates having means thereon for forming a diiierent, insignia in each block cast between the ring-like members and the division plates.

4. A mold-for concrete an outer and an inner ring-like member having sides making difierent angles with reference to the vertical, division plates between said ring-like members, and base plates upon which saidvringelike members are adapted to rest, said base plates having means thereon for forming. successive members in the blocks cast between the ring-like members and the division plates, whereby the blocks may be readily reassembled in their correct order.

5. A mold for concrete blocks comprising an inner and an outer conical ring-like member arranged in spaced relation,'substantially radial division plates located between said members in spaced relation to'each other,

and means for temporarily holding said plates in position.

6. A mold for concrete blocks comprising an inner and an outer conical ring-like member arranged in spaced relation, substantially radial division plates located between said members in spaced relation to each other and means for temporarily holding said plates in position, said division plates having a vertically disposed flute therein to produce a depression at one end of one block and a corresponding projection at the other end .of thenext adjacent block.

7. A mold for concrete blocks comprising an inner and an outer ring-like member having sides; making diiierentangles with reference to the vertical, division plates between.

said ring-like members and base plates upon which said ring-like members are adapted to rest.

have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wis consin.

, ALDEMAR F. STUEWE.

In testimony that I claim the foregoingl 

